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BLDC Fan Motor Driver Features Resistor-Programmable, Sensorless Sinusoidal Architecture

Tue, 12/13/2011 - 7:39am
BLDC fan motor driverMicrochip Technology Inc. expanded its sinusoidal, sensorless, 3-phase BLDC fan motor driver portfolio with the MTD6505 — a standalone, resistor-programmable driver that enables the selection of multiple back-EMF coefficient ranges. This feature allows engineers to design for a wide variety of 3-phase BLDC fan characteristics with a single device, thus saving time and money by standardizing multiple product lines on one driver and very few external components. Additionally, driver comes in a 3x3 mm UDFN package with a 0.5 mm thickness for space-constrained applications, such as thin laptops and tiny BLDC fans. To enable high energy efficiency and quiet operation with low acoustic noise and mechanical vibration, the MTD6505 includes a 180-degree sinusoidal drive. Being a sensorless driver means that the MTD6505 eliminates the need for an external Hall-Effect sensor. Additionally, the driver provides a number of on-chip protection features to preserve the motor’s life and avoid harmful operating conditions, including thermal shutdown, over-current limiting and lock-up protection.

Microchip also announced the MTD6505 3-Phase BLDC Sensorless Fan Controller Demonstration Board (part # ADM00345), which is expected to be available in January for $59.99 at http://www.microchip.com/get/T560. This demo board comes with a 3-phase BLDC fan and three MTD6505 plug-in modules. Additionally, a free GUI is available for download that simplifies fan monitoring and control with the onboard PIC microcontroller.

Microchip Technology Inc.
888-624-7435, www.microchip.com
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